Tautology

Rhetorical tautology[1] is defined as "needless repetition of an idea, statement, or word".
An example of a rhetorical tautology would be, for instance, a "godless atheist", "secularscience" or a "three-sided triangle" (as opposed to "all triangles have three sides", which is a definition).

A philosophical tautology is [2]"a compound propositional form all of whose instances are true", such as “A or not A.”
For example, "This candidate will win or will not win.”
Another example is "If it rains, it will rain."

An example of a rhetorical tautology is presented in Christian YouTube producer shockofgod's "challenge to atheists", in which he requests that atheist's give "proof and evidence" that atheism is "accurate and correct"; two prime examples of rhetorical tautologies. 'Proof' and 'evidence' are semantically different only to a negligible degree; whilst 'accurate' and 'correct' are in fact exactly the same.